feat(rag): add claw-rag-service

Adds claw-rag-service for repository indexing and semantic search.

rust/crates/claw-rag-service/Dockerfile

@@ -0,0 +1,20 @@
+# qdrant-client currently requires a fairly recent stable Rust.
+# Keep this pinned to avoid surprise breaks from `rust:latest`.
+FROM rust:1.91-bookworm AS builder
+
+WORKDIR /repo
+COPY . /repo/rust/
+
+WORKDIR /repo/rust
+# Sanity check toolchain version (helps debug CI/Docker Desktop issues).
+RUN rustc --version && cargo --version
+# Build the service with qdrant support enabled (works even if you don't use qdrant).
+RUN cargo build -p claw-rag-service --release --features qdrant-index
+
+FROM debian:bookworm-slim
+
+WORKDIR /app
+COPY --from=builder /repo/rust/target/release/claw-rag-service /app/claw-rag-service
+
+EXPOSE 8787
+ENTRYPOINT ["/app/claw-rag-service"]